JP2015028595A - Projector, control method of projector, and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector that can notify a user that the projector is set to a color mode not supporting the outside illuminance.SOLUTION: When a projector 1 is turned on (step S101), illuminance measuring means measures the illuminance on the outside of the projector (step S104), and when a preset color mode does not support the illuminance (step S105: N), projects a notification image to notify a user of the effect (step S106).

Description

  The present invention relates to a projector, a projector control method, and a display device.

  2. Description of the Related Art Conventionally, a projector that projects an image on a projection surface such as a screen is equipped with a color mode function that sets a plurality of image quality adjustment values according to the type of image and ambient brightness. For example, there are a theater mode for watching a movie in a dark room and a dynamic mode for projecting a projected image brighter in a bright room. When the theater mode is set in a bright room, the image is dark and difficult to see. Conversely, when the dynamic mode is set in a dark room, the image is too bright and too dazzling. For this reason, a projector that sets a color mode corresponding to ambient brightness is disclosed, as in Japanese Patent Application Laid-Open No. H10-228707. According to such a projector, the color mode is automatically set according to the preset illuminance.

JP 2010-243870 A

  However, in a projector such as Patent Document 1, the set color mode may not necessarily be a setting desired by the user depending on the viewing environment such as the type of image to be projected and the brightness of the room. In addition, since the color mode is switched when it is not intended due to a change in brightness, the user may be confused.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example is a projector having an image projection unit that modulates light emitted from a light source according to image information based on an input image signal and projects an image on a projection surface. An illuminance measuring unit that measures illuminance outside the projector and a plurality of color modes for setting image quality adjustment of the image, and a color mode setting unit that sets the image to any one of the color modes. Storage means for storing a color mode table that defines the color mode corresponding to the measured illuminance range, and the illuminance range based on the color mode table when the projector is powered on. Control means for informing when the color mode that does not correspond is set.

  According to this application example, when the projector is turned on, a notification is made when a color mode that does not correspond to external illuminance is set, so the user is prompted to change to a color mode that corresponds to illuminance. It becomes possible.

  Application Example 2 In the projector according to the application example, when the illuminance measurement unit detects that the illuminance has changed, the control unit responds to the illuminance range based on the color mode table. It is preferable to notify when the color mode is not set.

  According to this application example, when a change in illuminance is detected during operation of the projector, a notification is given when the color mode does not correspond to the illuminance. Therefore, if the usage environment of the projector changes, the current color mode is suitable for the illuminance. It is possible to notify the user that there is no color and to prompt the user to change to the color mode corresponding to the illuminance.

  Application Example 3 In the projector according to the application example, the control unit does not correspond to the illuminance range based on the color mode table when the color mode is changed by the color mode setting unit. It is preferable to notify when the color mode is changed.

  According to this application example, when the color mode of the projector is changed, notification is made when the new color mode does not correspond to the current illuminance, so it is possible to prompt the user to change to the color mode corresponding to the illuminance. Become.

  Application Example 4 In the projector according to the application example, it is preferable that the control unit projects the color mode list corresponding to the illuminance by the image projection unit based on the color mode table.

  According to this application example, since a list of color modes corresponding to the current illuminance is displayed, the user can select a color mode corresponding to the illuminance.

  Application Example 5 A projector control method according to this application example includes an image projection unit that modulates light emitted from a light source according to image information based on an input image signal and projects an image on a projection surface. A projector control method comprising: an illuminance measurement step for measuring illuminance outside the projector; and a plurality of color modes for setting image quality adjustment of the image, wherein the image is set to any one of the color modes. A color mode setting step to be set, a determination step for determining whether or not the color mode corresponding to the measured illuminance range is set, and a measurement by the determination step when the projector is turned on. A notification step for notifying when it is determined that the color mode corresponding to the illuminance range is not set; Characterized in that it has a.

  According to this application example, when the projector is turned on, a notification is made when a color mode that does not correspond to external illuminance is set, so the user is prompted to change to a color mode that corresponds to illuminance. It becomes possible.

  Application Example 6 A display device according to this application example is a display device that displays an image according to image information based on an input image signal, and an illuminance measuring unit that measures illuminance outside the display device. A plurality of color modes for setting image quality adjustment of the image, color mode setting means for setting the image to any one of the color modes, and defining the color mode corresponding to the measured illuminance range Storage means for storing the color mode table, and control means for notifying when the color mode not corresponding to the illuminance range is set based on the color mode table when the display device is powered on. And.

  According to this application example, when a color mode that does not correspond to external illuminance is set when the display device is turned on, the user is prompted to change to a color mode that corresponds to illuminance. Is possible.

1 is a block diagram showing a circuit configuration of a projector according to an embodiment. The flowchart which shows operation | movement when a projector powers on. 6 is a flowchart illustrating an operation when a change in external illuminance is detected during operation of the projector and when a color mode change operation is received. The figure which shows the example of the image which alert | reports that it is a color mode which does not respond | correspond to external illumination intensity. The figure which shows the example of the preservation | save content of a color mode table.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the following embodiment does not limit the invention according to the scope of claims, and all combinations of features in the embodiment are based on the invention. It is not always essential to the solution.

(Embodiment)
FIG. 1 is a block diagram showing a circuit configuration of a projector 1 as a display device of the present embodiment.
As shown in FIG. 1, the projector 1 includes an image input terminal 6, an image projection unit 10, an OSD processing unit 16, an image signal processing unit 17, an image signal input unit 18, an illuminance measurement unit 19, a control unit 20, and a storage unit 21. The light source control means 22, the input operation means 23, the power supply terminal 30, the power supply unit 31 and the like are arranged on the inside or the outer surface of a housing not shown.

  The image projection means 10 includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive means 14, and the like. The image projection means 10 modulates the light emitted from the light source 11 by the liquid crystal light valves 12R, 12G, and 12B, and projects the modulated image from the projection lens 13 to project the projected image on the projection surface such as the screen SC. indicate.

The light source 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. ing.
Light emitted from the light source 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue, which are the three primary colors of light, by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the corresponding liquid crystal light valves 12R, 12G, 12B.

  The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. In the liquid crystal light valves 12R, 12G, and 12B, a plurality of pixels (not shown) arranged in a matrix are formed, and a driving voltage can be applied to the liquid crystal for each pixel.

When the liquid crystal driving unit 14 applies a driving voltage corresponding to the input image data to each pixel, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source 11 is modulated by passing through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light.
The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected onto the screen SC or the like by the projection lens 13 to become a projection image.

  In the present embodiment, the projector 1 that projects using the light source lamp 11a as the light source is exemplified. However, the present invention is also applicable to a projector that projects using a light emitting diode (LED) light source or a laser light source as the light source. Can do.

  In the present embodiment, the image projection means 10 is exemplified by a transmissive liquid crystal type projection optical system using three liquid crystal light valves 12R, 12G, and 12B, but a reflective liquid crystal display method or a micromirror device method ( A light modulation device of another display method such as a light switch display method may be employed.

  The control means 20 includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory) used for temporary storage of various data, and the like, according to a control program (not shown) stored in the storage means 21. By operating, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21. The control unit 20 includes a color mode setting unit 201. The color mode setting unit 201 selects and sets one of a plurality of color modes for setting image quality adjustment of an image to be projected by the image projection unit 10. The color mode is an item for adjusting the image quality according to the type of image, viewing environment, etc.For example, in a bright environment, “dynamic” suitable for viewing that emphasizes gradation expression in dark areas, "Living room" suitable for viewing in a movie, "Theater" suitable for watching a movie in a dark environment, "Photo" suitable for projecting still images such as photographs in a bright environment, using color materials in a bright environment There are color modes such as “Presentation” suitable for presentation and “Game” suitable for playing a game in a bright environment.

  The storage means 21 is composed of a rewritable nonvolatile memory such as a flash memory or FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various setting data for defining operation conditions of the projector 1, and the like. In the present embodiment, a color mode table 211 in which a color mode corresponding to the illuminance range around the projector 1 is defined is stored. Specifically, the definition content indicating whether each color mode corresponds to each measured illuminance range is stored.

  FIG. 5 is a diagram showing an example of the contents stored in the color mode table 211. As shown in FIG. 5, whether each color mode corresponds to the measured illuminance range is defined as Yes or No. For example, when the measured illuminance is 301 to 500 Lux, each color mode of dynamic, presentation, and game corresponds, and when the measured illuminance is 0 to 5 Lux, it indicates that only the theater mode is supported. .

  Returning to FIG. 1, the input operation means 23 includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the input operation means 23 include a power key for alternately switching on / off the power supply, an input switching key for switching a plurality of image input terminals 6 input to the image signal input means 18, and various types. A menu key that overlays the setting menu for setting, a cursor key for the user to select a setting item from the menu, a determination key for determining various settings, an escape key for returning the screen being set, and a color mode There are color mode keys for selection.

  When the user operates various operation keys of the input operation unit 23, the input operation unit 23 outputs an operation signal corresponding to the operation content of the user to the control unit 20. The input operation means 23 may have a configuration including a remote controller (remote control) signal receiving means (not shown) and a remote controller (not shown) capable of remote operation. In this case, the remote controller emits an operation signal such as an infrared ray according to the operation content of the user, and the remote control signal receiving means receives it and transmits it to the control means 20 as control information.

  The illuminance measuring means 19 includes an optical sensor (not shown) and the like, and measures the illuminance outside the projector 1 based on an instruction from the control means 20. The measured illuminance is notified to the control means 20.

  The light source control unit 22 controls supply and stop of power to the light source 11 based on an instruction from the control unit 20, and switches between turning on and off the light source 11.

  The image signal input means 18 receives image information from a plurality of image input terminals 6 from an external image output device such as a video reproduction device or a personal computer via a cable (not shown) or a communication device. The input image information is output to the image signal processing unit 17 based on an instruction from the control unit 20. Note that the image signal input unit 18 may include a receiving unit for wireless communication, optical communication, or the like, and input an image signal wirelessly from an external device.

  The image signal processing unit 17 converts the image information input from the image signal input unit 18 into image data representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B based on an instruction from the control unit 20. Here, the converted image information is classified into red (R), green (G), and blue (B) color lights, and a plurality of pixels corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. Consists of values. The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted is defined by this pixel value.

  The OSD processing unit 16 performs processing for superimposing and displaying an OSD (on-screen display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing unit 16 includes an OSD memory (not shown) and stores OSD image data representing graphics, fonts, and the like for forming an OSD image.

When the control means 20 instructs to superimpose the OSD image, the OSD processing means 16 reads the necessary OSD image data from the OSD memory, and outputs an image signal so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image data is synthesized with the image data input from the processing means 17. The image data combined with the OSD image information is output to the liquid crystal driving means 14.
When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 16 outputs the image data input from the image signal processing unit 17 to the liquid crystal driving unit 14 as it is.

  When the liquid crystal driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image data input from the OSD processing unit 16, an image corresponding to the image data is projected from the projection lens 13 and projected onto the projection surface of the screen SC. An image is displayed.

  The power supply unit 31 is supplied with electric power such as AC 100V from the outside via the power supply terminal 30. The power supply unit 31 converts input power (AC power) into predetermined DC power and supplies the power to each unit of the projector 1. In addition, the power supply unit 31 stops supplying power (operating power) necessary for image projection to each unit (power-on state) and operating power supply based on an instruction from the control unit 20. It is possible to switch between a state (standby state) of waiting for an operation for turning on.

Next, the operation of the projector 1 according to the present embodiment will be described with reference to FIGS.
FIG. 2 is a flowchart showing an operation when the projector 1 is powered on, and FIG. 3 shows an operation when a change in external illuminance is detected while the projector 1 is operating and when a color mode changing operation is accepted. It is a flowchart.

[Operation when the power is turned on]
As shown in FIG. 2, when the projector 1 is turned on by the power key of the input operation unit 23 (step S101), the control unit 20 instructs the light source control unit 22 to turn on the light source 11 (step S102). The process proceeds to step S103.

  In step S103, the color mode setting unit 201 sets an image quality adjustment value based on the currently selected color mode in the image projection unit 10, and the process proceeds to step S104. Step S103 corresponds to a color mode setting step.

  In step S104, the control unit 20 measures the illuminance outside the projector 1 by the illuminance measurement unit 19, acquires the measurement result, and proceeds to step S105. Step S104 corresponds to an illuminance measurement step.

  In step S105, the control unit 20 checks whether the currently set color mode corresponds to the illuminance acquired in step S104 based on the color mode table 211. If the currently set color mode corresponds to illuminance (step S105: Y), the process proceeds to step S110. If the color mode does not correspond to illuminance (step S105: N), the process proceeds to step S106. Step S105 corresponds to a determination step.

FIG. 4 is a diagram illustrating an example of an image when a color mode not corresponding to the illuminance range is set.
In step S106, when the color mode that does not correspond to the illuminance range is set, the control unit 20 displays the notification image M1 indicating that the color mode does not correspond to the illuminance as shown in FIG. 10 to project.
As shown in FIG. 4, in the notification image M1, a currently set color mode (dynamic), a color mode corresponding to the measured illuminance (living, photo), and the like are displayed. Next, the process proceeds to step S107. Step S106 corresponds to a notification step.

  In step S107, the control means 20 checks whether or not an operation for changing the color mode is received for the notification image M1. When an operation for changing the color mode is received (step S107: Y), the process proceeds to step S108. If an operation for changing the color mode is not accepted (step S107: N), the process proceeds to step S109.

  In step S108, the color mode setting unit 201 sets an image quality adjustment value based on the color mode accepted in step S107 in the image projection unit 10, and the process proceeds to step S109. Step S108 corresponds to a color mode setting step.

  In step S109, the control means 20 deletes the notification image M1, and proceeds to step S110.

  In step S110, the projector 1 starts projecting an image and ends the operation flow.

[Operation when illuminance change is detected during operation]
As shown in FIG. 3, when the illuminance measuring unit 19 detects that the illuminance outside the projector 1 has changed while the projector 1 is operating (step S201), the process proceeds to step S202.

  In step S202, the control unit 20 checks whether the currently set color mode corresponds to the measured illuminance based on the color mode table 211. If the color mode corresponds to illuminance (step S202: Y), the process proceeds to step S207. When the color mode does not correspond to illuminance (step S202: N), the process proceeds to step S203. Step S202 corresponds to a determination step.

  In step S <b> 203, the control unit 20 projects the notification image M <b> 1 indicating that the color mode does not correspond to illuminance by the image projection unit 10. As shown in FIG. 4, in the notification image M1, a currently set color mode, a color mode corresponding to the measured illuminance, and the like are displayed. Next, the process proceeds to step S204. Step S203 corresponds to a notification step.

  In step S204, the control means 20 checks whether or not an operation for changing the color mode is received for the notification image M1. When an operation for changing the color mode is received (step S204: Y), the process proceeds to step S205. If an operation for changing the color mode is not accepted (step S204: N), the process proceeds to step S206.

  In step S205, the color mode setting unit 201 sets an image quality adjustment value based on the color mode accepted in step S204 in the image projection unit 10, and the process proceeds to step S206. Step S205 corresponds to a color mode setting step.

  In step S206, the control means 20 deletes the notification image M1, and proceeds to step S207.

  In step S207, the operation flow ends.

[Operation when color mode change operation is accepted during operation]
As shown in FIG. 3, when a change operation of the color mode is received by the color mode key of the input operation unit 23 or the like while the projector 1 is operating (step S211), the color mode setting unit 201 changes the color mode and newly An image quality adjustment value based on the set color mode is set in the image projection means 10 (step S212), and the process proceeds to step S213. Step S212 corresponds to a color mode setting step.

  In step S213, the control unit 20 measures the illuminance outside the projector 1 by the illuminance measuring unit 19, and the process proceeds to step S202. Since the operation after step S202 has been described above, the description thereof will be omitted.

According to the embodiment described above, the following effects can be obtained.
According to the projector 1 of the present embodiment, when the projector 1 is turned on, based on the color mode table 211, when the color mode that does not correspond to the external illuminance is set, the notification image M1 is notified. It is possible to prompt the user to change to the color mode corresponding to the illuminance.

  Further, when the illuminance measuring means 19 detects a change in illuminance while the projector 1 is operating, the color mode table 211 is used to notify when the color mode does not correspond to illuminance, so that the usage environment of the projector 1 has changed. It is possible to notify that the current color mode is not suitable for the illuminance, and to prompt the user to change to the color mode corresponding to the illuminance.

  Further, when the color mode of the projector 1 is changed, notification is made when the new color mode does not correspond to the current illuminance based on the color mode table 211, so the user is prompted to change to the color mode corresponding to the illuminance. Is possible.

  If a color mode not corresponding to the current illuminance is selected based on the color mode table 211, a list of color modes corresponding to the current illuminance is displayed, so that the user can select a color mode corresponding to the illuminance. It becomes possible to select.

Moreover, you may change the said embodiment as follows.
(Modification 1) In the above-described embodiment, the projector 1 may be configured so that the user can define and change the color mode corresponding to the illuminance. This makes it possible to set the color mode corresponding to the illuminance based on the user's preference and usage situation.

  (Modification 2) In the above-described embodiment, the projector further includes distance measuring means for measuring the distance to the projection surface, and the color mode is set in accordance with the illuminance outside the projector in consideration of the distance from the projector to the projection surface. You may make it judge whether it respond | corresponds. For example, the distance range from the projector to the projection surface is divided into three stages, and a color mode table corresponding to the illuminance range of FIG. 5 is prepared and associated with each distance range. Specifically, if the distance from the projector to the projection surface is short, the projected image will be bright, so the color mode suitable for a bright environment will become darker, and the longer the distance, the darker the projected image will be. Make the mode compatible. That is, even when the external illuminance is the same, a more appropriate color mode can be selected according to the distance to the projection surface.

(Modification 3) Moreover, although the aspect applied to the projector 1 which projects an image was illustrated in embodiment mentioned above, the technical idea of this invention is not limited to such a projector 1. FIG. For example, the present invention can be applied to a display device that displays an image according to image information based on an input image signal. In other words, depending on the viewing environment such as the type of image to be displayed, the brightness of the room, etc., the color mode that is set does not necessarily become the setting desired by the user, or the color mode is switched when it is not intended due to changes in brightness. Therefore, the problem that the user is confused can be solved.
Such a display device is assumed to be a cathode ray tube (CRT), a liquid crystal display, a plasma display, an organic EL display, a head mounted display, or the like.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 6 ... Image input terminal, 10 ... Image projection means, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve, 13 ... Projection lens, 14 ... Liquid crystal drive means, 16 ... OSD processing means, 17 ... Image Signal processing means 18 ... Image signal input means 19 ... Illuminance measurement means 20 ... Control means 201 ... Color mode setting means 21 ... Storage means 211 ... Color mode table 22 ... Light source control means 23 ... Input operation Means: 30 ... power terminal, 31 ... power source, SC ... screen.

Claims (6)

A projector having an image projection unit that modulates light emitted from a light source according to image information based on an input image signal and projects an image on a projection surface,
Illuminance measuring means for measuring the illuminance outside the projector;
A plurality of color modes for setting image quality adjustment of the image, color mode setting means for setting the image to any one of the color modes;
Storage means for storing a color mode table defining the color mode corresponding to the measured illuminance range;
Control means for notifying when the color mode not corresponding to the illuminance range is set based on the color mode table when the projector is powered on;
A projector characterized by comprising: The projector according to claim 1.
When the illuminance measurement means detects that the illuminance has changed, the control means informs when the color mode that does not correspond to the illuminance range is set based on the color mode table. A projector characterized by that. The projector according to claim 1 or 2,
The control means notifies when the color mode is changed by the color mode setting means when the color mode is changed to a color mode that does not correspond to the illuminance range based on the color mode table. Characteristic projector. The projector according to any one of claims 1 to 3,
The projector, wherein the control means projects a list of the color modes corresponding to the illuminance by the image projection means based on the color mode table. A method of controlling a projector having image projection means for modulating light emitted from a light source according to image information based on an input image signal and projecting an image on a projection surface,
An illuminance measuring step for measuring the illuminance outside the projector;
A color mode setting step including a plurality of color modes for setting image quality adjustment of the image, and setting the image to any one of the color modes;
A determination step of determining whether or not the color mode corresponding to the measured illuminance range is set;
An informing step for notifying when the color mode corresponding to the measured illuminance range is not set by the determining step when the projector is turned on;
A projector control method characterized by comprising: A display device that displays an image according to image information based on an input image signal,
Illuminance measuring means for measuring the illuminance outside the display device;
A plurality of color modes for setting image quality adjustment of the image, color mode setting means for setting the image to any one of the color modes;
Storage means for storing a color mode table defining the color mode corresponding to the measured illuminance range;
Control means for notifying when the color mode not corresponding to the illuminance range is set based on the color mode table when the display device is powered on;
A display device comprising:

Images